Yiu Yiu Tun To; Sao Yiu Chum Biu Waist has to be flexible to swallow and spit, Hands have to be sunk and thrusting. Traditional Writing: 腰要吞吐 手要沉標 http://wingchunlexicon.com/wp-content/uploads/2016/12/JIU1-JIU3-TAN1-TOU3-SAU2-JIU3-CAM4-BIU1-_mdash-Wing-Chun-Elements_-Glossary.mp3